1993 Ford Aerostar General Question

0ur 1993 Ford Van heater/ac fan will only work on high level. We replaced the switch and fan motor. It still does the very same thing like we had done nothing to it. Afraid to spend more money in the wrong direction. Do you have any advice?

Posted Nov 29th by Karen Snekvik the owner of a Ford Aerostar Heater, HVAC, Air Conditioning, ford aerostar

Answers from the Automotive Experts

Was the fan BELT checked and replaced as well?

⟩ Answered on Nov 29th, 2010 by Colleen McGee, Driving Instructor at Americas Driving School

Did you check the fuses? Check your Owner's Manual for the various fuses to locate the one that regulates the heater/AC fan. Fuses are relatively inexpensive. It is worth a try. Georgia Brown

⟩ Answered on Nov 29th, 2010 by Georgia Brown, Director of Education at National Independent Automobile Dealers Association (NIADA)

Karen, On the outside of the motor is a rheostat like component, this typically causes your concern of working only on high. Especially having replaced your switch and motor, definitely narrows down to a rheostat.

⟩ Answered on Nov 29th, 2010 by Amanda J. Pierce, MBA "AJ", Certified Mechanic at VIGOR Alaska Industrial Shipyard

Hello Karen, I understand you have already replaced the switch and fan motor. Inside the car, the actual speed control selector itself has been known to cause the exact trouble you are explaining. I am concerned the tech you are using is not sure as to the direct cause of the trouble. I suggest, before having repairs done, take your car for a second opinion. This will ensure you are not spending money in the wrong direction and you will have piece of mind the repairs you do, will cure the trouble you're having with your car. Mechanically yours, Audra www.womenAUTOknow.com

⟩ Answered on Nov 29th, 2010 by Audra Fordin, Owner at Great Bear Auto Shop

Hello Karen- best guess it is probably a bad resistor - that controls the lower fan speeds- consult a shop repair manual to find the location of the resistor for your car- hope this helps- Thanks Super Girls Auto.

⟩ Answered on Nov 29th, 2010 by Laurie Sarno, Co-Owner at Super Girls Auto

Dear Karen, It's probably the relay for the switch. When they go bad they only work on high. Lori Johnson www.ladiesstartyourengines.com

⟩ Answered on Nov 29th, 2010 by Lori Johnson, Owner and Instructor at Ladies Start Your Engines

My first inclination is: Blower motor resistor Take it back to where you first had it serviced and go this direction.. With good communication you can get this solved. One question, if you replaced the switch and fan motor on your own, you may have spend monies that didn't need spend! Expert Diagnois is key to Repair....

⟩ Answered on Nov 29th, 2010 by Pat Fleischmann, Director of First Impressions at Community Tire Pros & Auto Repair

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